I my answer to you will be incorrect. However I thought you can save your userdate to a localstorage. I am sure you can save it as a cookie with your browser, however when your player empty the cookie cache, your game data will also be lost.
Why not saving your data to the cloud and also as a browser cookie? In case the cache is being emptied, then your player can restore from the cloud? This will also help in cases when the player has no internet.
There is some tutorial somewhere about saving user data in C3, however I can't find it.
Hope this helps.
Hi, thanks for the suggestion. As I already mentioned, on android it wipes localstorage data when transferring from C2 version to C3. I was thinking of native storage to make sure even players who play without internet connection get to save their data, but if it doesn't work, I'll try cloud saves, I guess.